activity
20092024
most citedNew Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant

538 citations · 7.2k across the 77 of their papers we have counts for

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Showing astro-ph.GAShow all

12 papers · 1 filter

astro-ph.GA2020★ 48 cited

Space Telescope and Optical Reverberation Mapping Project. XII. Broad-Line Region Modeling of NGC 5548

P. R. Williams, A. Pancoast, T. Treu +155

We present geometric and dynamical modeling of the broad line region for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The dataset includes photo…

astro-ph.GA2020★ 131 cited

The Palomar Transient Factory Core-Collapse Supernova Host-Galaxy Sample. I. Host-Galaxy Distribution Functions and Environment-Dependence of CCSNe

Steve Schulze, Ofer Yaron, Jesper Sollerman +51

Several thousand core-collapse supernovae (CCSNe) of different flavors have been discovered so far. However, identifying their progenitors has remained an outstanding open question…

astro-ph.GA2020★ 79 cited

Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548

Keith Horne, G. De Rosa, B. M. Peterson +155

We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a…

astro-ph.GA2019★ 48 cited

Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

G. A. Kriss, G. De Rosa, J. Ely +164

We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of t…

astro-ph.GA2018★ 95 cited

The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-Line Region

Peter R. Williams, Anna Pancoast, Tommaso Treu +22

We present models of the H-emitting broad-line region (BLR) in seven Seyfert 1 galaxies from the Lick AGN (Active Galactic Nucleus) Monitoring Project 2011 sample, drawing infer…

astro-ph.GA2018★ 36 cited

Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years

A. Pancoast, A. J. Barth, K. Horne +24

The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning . We present modeling of these velocity-resolved reverberation mappi…

astro-ph.GA2017★ 39 cited

Space Telescope and Optical Reverberation Mapping Project. VII. Understanding the UV anomaly in NGC 5548 with X-Ray Spectroscopy

S. Mathur, A. Gupta, K. Page +147

During the Space Telescope and Optical Reverberation Mapping Project (STORM) observations of NGC 5548, the continuum and emission-line variability became de-correlated during the s…

astro-ph.GA2017★ 130 cited

Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-Line Analysis for NGC 5548

L. Pei, M. M. Fausnaugh, A. J. Barth +153

We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multi-wavelength reverberation mapping campaign. The campaign spanned s…

astro-ph.GA2015★ 202 cited

The Lick AGN Monitoring Project 2011: Spectroscopic Campaign and Emission-Line Light Curves

A. J. Barth, V. N. Bennert, G. Canalizo +27

In the Spring of 2011 we carried out a 2.5 month reverberation mapping campaign using the 3 m Shane telescope at Lick Observatory, monitoring 15 low-redshift Seyfert 1 galaxies. Th…

astro-ph.GA2014★ 45 cited

Reverberation Mapping of the Kepler-Field AGN KA1858+4850

Liuyi Pei, Aaron J. Barth, Greg S. Aldering +40

KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapp…

astro-ph.GA2010★ 49 cited

A High-Resolution Survey of HI Absorption toward the Central 200 pc of the Galactic Center

Cornelia C. Lang, W. Miller Goss, Claudia Cyganowski +1

We present an HI absorption survey of the central 250 pc of the Galaxy. Very Large Array (VLA) observations were made at 21 cm in the DnC and CnB configurations and have a resoluti…

astro-ph.GA2009★ 36 cited

The Radio Properties and Magnetic Field Configuration in the Crab-like Pulsar Wind Nebula G54.1+0.3

Cornelia C. Lang, Q. Daniel Wang, Fangjun Lu +1

We present a multifrequency radio investigation of the Crab-like pulsar wind nebula (PWN) G54.1+0.3 using the Very Large Array. The high resolution of the observations reveals that…